Lack of notifications from zoho mail mobile app for additional pop3 accounts

Lack of notifications from zoho mail mobile app for additional pop3 accounts

Hi,

I'm quite a new user to zoho mail, so hello everybody :)

I've connected an external pop3 account to my zohomail account, so I can see all emails in one place. Then I've installed a mobile application on my phone with Android. After logging in all accounts are visible and configured so I can see mails from external pop3 mail accout. 

The problem starts with notifications. While other applications I use on my mobile give me the notifications from pop3 accounts, Zoho mail mobile app only notify me when a new mail has come to zoho mail account, but does trigger notification when a new mail has come to external pop3 account. 

The question is, how can I fix that? Is there any configuration I've missed, or is it something wrong with my mobile?

Best,
Tomas